Please use this identifier to cite or link to this item: https://idr.l4.nitk.ac.in/jspui/handle/123456789/12406
Title: Optical limiting materials: Synthesis, electrochemical and optical studies of new thiophene based conjugated polymers carrying 1,3,4-oxadiazole units
Authors: Shivashankar, S.M.
Anantapadmanabha, V.K.
Adhikari, A.V.
Issue Date: 2013
Citation: Polymer Engineering and Science, 2013, Vol.53, 6, pp.1347-1356
Abstract: In this communication we report synthesis of three new donor-acceptor (D-A) type conjugated polymers carrying 1,3,4-oxadiazole moiety and thiophene unit with different side groups at its 3,4 positions (4-methoxybenzyl:P1, 3-methylbenzyl:P2 and 4-nitrobenzyl:P3) through polycondensation route using a series of newly synthesized monomers. The structures of new monomers and polymers were confirmed by NMR, FTIR spectroscopic methods followed by elemental analysis. Further, molecular weight and thermal stability were determined using gel permeation chromatography and thermogravimetric analysis. The linear optical and electrochemical properties of polymers were investigated by UV-vis absorption, fluorescence spectroscopic, and cyclic voltammetric studies. The polymers P1-P3 were found to be thermally stable and their electrochemical band gaps were determined to be 1.98, 2.14, and 2.18 eV respectively. Further their nonlinear optical properties were investigated by Z-scan method using 532 nm, 7 ns laser pulses. The results reveal that they possess good optical limiting behavior due to effective three-photon absorption (3PA) with absorption coefficient 2.5 10-24 m-3W2, 1.6 10-24 m-3W2, and 1.0 10 -24 m-3W2. 2012 Society of Plastics Engineers.
URI: http://idr.nitk.ac.in/jspui/handle/123456789/12406
Appears in Collections:1. Journal Articles

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.